/Engine/Source/Runtime/Core/Public/Math/SHMath.h
In-place subtraction operator. Changed from (*this = *this - InB;) to separate all calc to avoid LHS Now it calls directly -= operator inTSHVector(avoidTSHVectorRGB- operator)
[TSHVectorRGB](API\Runtime\Core\Math\TSHVectorRGB) & operator-= ( const [TSHVectorRGB](API\Runtime\Core\Math\TSHVectorRGB) & InB )